4results about How to "Improve battery stability" patented technology

Provided is a rechargeable lithium battery including a positive electrode including a positive active material layer; a negative electrode including a negative active material layer; and an electrolyte solution including a nonaqueous organic solvent, a lithium salt, and an additive, wherein the positive active material layer includes a positive active material and carbon nanotube, the carbon nanotube is included in an amount of greater than 0.1 wt% and less than 3.0 wt% based on the total weight of the positive active material layer, and the additive includes a compound represented by Chemical Formula 1. Details of Chemical Formula 1 are as described in the specification.

The present invention relates to an apparatus and a method for diagnosing an increase in the resistance of a battery cell lead part, and a method for diagnosing a battery cell, according to one embodiment of the present invention, comprises: a first voltage measuring step of measuring the voltage of each unit cell of a battery pack when the battery pack is in an open circuit voltage state; a second voltage measuring step of measuring the voltage for each unit cell according to a predetermined current flowing in the battery pack when the battery pack is in a charged state or discharged state; and a step of detecting whether the unit cell is abnormal by comparing the voltage measured in the first voltage measuring step with the voltage measured in the second voltage measuring step for each unit cell.

Provided are a battery module configured to ensure structural stability even when a thermal event occurs, a battery pack, and a vehicle including the battery pack. A battery module includes a cell assembly including a plurality of battery cells, and a compression pad assembly located between the plurality of battery cells, the compression pad assembly including a heat blocking unit in which at least one hollow portion is formed.

The present invention relates to a battery case and a secondary battery.More particularly, the present invention relates to a battery case including a battery case and a gas adsorber accommodated inside the case, wherein a gas adsorption pack is opened as the internal temperature of the case increases; and a secondary battery. According to the present invention, the present invention has an effect of providing a battery case capable of quickly adsorbing gas generated inside a secondary battery due to abnormal operation or degradation of the secondary battery by opening a gas adsorption pack filled with a gas adsorbent accommodated inside the case without an additional system or sensing device to secure the stability of the secondary battery, prevent deformation of the case, and reduce the resistance of the secondary battery and allowing the secondary battery to be operated even after the gas adsorption pack is opened; and a secondary battery.